KSC USP compact blowback chamber
 

I had a mishap with a shity bottle of propane. since then when I use propane in my gun it will not fire. the slide cycles back about 1 inch and an extreme amount of gas blows out of the barrel and through the ejection port. for a while it was working fign on duster gas, however now it dose the same thing on duster as explained above. now I have completely taken the blowback chamber apart, as well as cleaned and relubed every part, so my question is there something I am missing like some sort of valve or flow restrictor anything that could have been damaged. or will I need to buy a new blowback chamber? now to kill 2 birds with one stone is there any shops that sell the complete blowback chamber? I have been unable to find any that sell the complete unit. there are some that have all the parts individually.

Where have you been able to find the USP Compact blowback chamber? I've been looking for a replacement for a long time now and haven't seen any available at any of the HK online stores.

http://www.wgcshop.com had some parts listed a while ago.

I have a busted USPc that I've been trying to pawn off for a while now. Only things wrong are the broken trigger, frame cracked at the back, safety doesn't work. PM if you're interested, AGE VERIFIED USERS ONLY since it is still an entire gun. Also have a Fobus Kydex Roto-Holster to go with it. Sorry to turn this into a sales post but I thought it relevant to the question.

*head=desk*
I have all of the same problems. The trigger is broken, the hopup rubber is ripped to shreds, safety doesnt work... What the hell. I will never own a KSC USP Compact ever again.

I also feel like selling it but we have our own section for ads so put it there.

Anyone have any fixes for KSC USPc? I can't find rubbers or triggers ANYWHERE. :???:

so in the end we all learned the same lesson. DONT BUY KSC USP COMPACT

If nobody is willing to butcher their USP Compact to sell me their blowback chamber then perhaps somebody would be willing to buy my functional USP Compact? I've got a second one so I don't mind selling this one off.

Description here --> http://www.airsoftcanada.com/showthr...ht=USP+Compact

Edit: my error in a rush I accidentally overlooked etiquette. PM me if interested. Also note I'm willing to sell for less without the mag.

I didn't know we could advertise guns for sale in the Discussion forum...

YOU FOOL ITS NOT BROKEEEEN


Take off your slide, take out your return spring and barrel, now pull the piston down all the way, if you cannot see a black rubber in the | | gap between the metal base and the plastic piston all you need to do is....

*will edit tommrowo SO TIRRRED OF THIS BLOODY GUN

Like neir says. I have a USP that sat unused for over a year. It was a little dried out and the first time I went to use it, same thing happened to me. I reseated the piston seal, gave her a shot of silicone and PRESTO!!!

It's worked fine ever since.

i tried that even replaced the seal with an o ring and it still happens.

ok, i kinda fergot about this....you replaced the seal? ummm how bout put the original one back in, and make sure that the smaller side of the o ring faces the back of the slide (a must)
If that doesnt help i'll take apart mine and take pictures to better illustrate what im saying. (or you could sell me your trigger, and throw the rest in the garbage)


Figure i might as well teach some of you kids how to reset the safty plate properly as well :| (my safty + de-cocker works perfect)

still looking for a trigger tho...anyone know a reliable place to find one? (or a place that might sell a re-enforoced version??)


(GOOD TIP KWO)




MORE Silicone on the piston PYLE!!! it'll work.

That cup seal will come off again unless you put a tiny drop of krazy glue to keep it from coming off. Be very careful otherwise you'll need a replacement seal.

is the cup seal not suposed to be seated tight against the back?

Its supposed to beat seated in the first place visiable when holding the piston upsidedown. (NOT against the very back)

IF this doesnt help, add me to msn i'll take more pictures....it'll work eventually

a-ex@hotmail.com